$9^{-4x-2}=27^{-3x+1}$
$3.030-15\infty$
$a^2+b^2+c^2=7$
$\left(\sin\left(t\right)\right)^2\cdot e^t-\left(e^t\right)^2$
$5x^2<20$
$8\sin^2x+7\cos^2x=0$
$\frac{1}{2}a+\frac{1}{2}$
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